Metered liquid dispensing apparatus



March 24, 1936.

G. w. ST EDWEL L v METERED LIQU ID DISPENSING APPARATUS Filed June 30,1932 5 Sheets-Sheet l I INVENTOR. GEORGE W. STEDWELL G. W. STEDWELLMETERED LIQUID DISPENSING APPARATUS March 24, 1936.

3 Sheets-Sheet 2 .Filed June 30,1952

Hwu m Raf INVENTOR.

GEORGE W. STEDWELL March 24, 1936- G. w. STEDWELL 2,034,845

METERED LIQUID DISPENSING APPARATUS Filed June 30, 1952 3 Sheets-Sheet 5INVENTOR.

mmm

15 matter, be it air Patented Mar. 24, 1936 George W. Stedwell,Brooklyn, N. Y.,

Keystone Controls, Inc., New York,

- notation of New York FFICE- Aplflicaflon June 30,1932, Serial No.620,099

I 36 Claims. (Cl. 2 2195) The present invention relates to meteredliquid dispensing apparatus and more particularly to the type ofapparatus used at filling stations V for dispensing liquid fuel toautomotive vehicles.

An object of my invention is to insure accuracy of measure of the liquiddispensed.

In apparatus of this character asheretofore constructed inaccuracies ofmeasure usually resuit from the presence of entrained air or vapor.

10 It is, therefore, an object of the present invention to provide meansfor separating entrained gas from the liquid before it enters the meter.

The term gas" is used in its generic sense to distinguish from liquidand includes any gaseous or vapor. Another object of the invention is toprovide a separator and meter combined into a unitary structure.

Another object of the invention is to provide my novel means for the gasthat has discharging been separated froni the liquid.

My invention has for a further object to insure substantially constantpressure in the liquid fed through the meter so as to overcomeinaccuracies of metering that result from wide variations of pressure.To this end, I provide means for controlling the speed of-the pump fromthe discharge nozzle of the delivery hose, the control being such thatwhen the delivery valve in the nozzle'is only partially open, the speedof the pump will be proportionately reduced and the pressure of liquidpassing through he meter will be held substantially to normal.

Other objects will appear in the following description of a preferredembodiment of my invention and of certain modifications, and thereafterthe novelty and scope of the invention will be pointed out in theclaims.

In the accompanying drawings;

Figure 1 is a view in front elevation of a dispenser embodying myinvention;

Fig. 2 is a detail view in front elevation and largely in section of arheostat control for the driving motor of the dispenser;

Fig. 3 is a detail view in side elevation and partly in section of ahose nozzle and certain control mechanism associated therewith;

Fig. 4 is, a detail view showing a modification,

of the nozzle control mechanism;

Fig. 5 is a view in-front elevation and partly in section of a preferredform of separator and parts associated therewith; and

Fig. 6 is a view in front elevation and partly in section of anotherform of separator-together with a novel control for the motor.

In general my improved dispenser vcomprises a casing l within which'is apump ll driven by a motor l2, and a. meter l3 having a dial l4 whichshows through a suitable opening in the casing. The pump draws liquidfrom a supply tank or reservoir l5 and forces the liquid through themeter into a delivery line It and thence to a deliveryhose II. Thelatter has a delivery nozzle l8 at its free end.

As shown in Fig. 5, the meter hasa g'as-separator combined therewith.This separator comprises a tank 20 closed at the top by a lid 2|.Agasket 22 under the lid providesan air seal for the tank. An inlet pipe24 is threaded through the bottom of the tank and the threaded joint issuitably sealed by a gasket 25 and lock nut 26. The lower projecting endof the pipe, is connected by a suitable coupling 21 to a pipe 28 leadingfrom the discharge port of the pump l l. a The upper end of the pipe 24enters a tubular filter or screen 29 in which it has a sliding fit.screen is secured to a plug 30 which is screwed into an opening inthelid. A gasket 3| is flttedibetween the lid and a flange on the plug soas to insure an"airtight seal. By this arrangement, whenever desired,the plug may be unscrewed to withdraw the screen so that it may becleaned.

Screwed into one side of theetank and preferably remote from the screen29, is a nipple 34 which has a'very small orifice 35 therein. Thisnipple is also tightly sealed into the tankby screwing it thereinagainst a gasket 36. The outer end of the nipple is screwed into aT-fltting 31 which forms part of a stand pipe as. This a5v stand pipeleads to the top of the dispenser and preferably terminates in a gooseneck 39. At its lower end the stand pipe is connected by T-fitting tothe supply pipe, connecting the pump H with the tank IS. The fitting 40is provided with 40 a valve 42 which opens downwardly but is normallyheld in closed position by a spring 43 to prevent the pump from drawingair through the stand pipe .38. The valve is also normally sealedbyliquid which overflows through the vent 35 45 into the stand pipe. Thespring is strong enough toprevent the valve from being opened bysuctionof the pump until a predetermined head of R liquid hasaccumulated in the stand pipe. Thus it requires both pump suction andliquid pressure to force the valve open. The accumulated liquid thenflows out into the supply pipe until the head of the liquid has droppedsufliciently to enable the spring to close the valve.

- It will be observed that the orifice 35 provides 1 an open vent forthe separator-tank 20 and determinates thenormal level of liquid in thetank. When the pump is operated the liquid will accumulate in the tankbecause it is pumped therestops, a check valve 44, opening toward thepump,

is provided in the supply line 4| below the fitting 40. The supply linepreferably extends to the bottom of the reservoir l and is supplied withthe usual foot valve (not shown). However, a foot valve cannot always bedepended upon to hold the supply line full of liquid. Furthermore, leaksmay develop in the supply line itself.

Hence, I find it desirable to provide the check valve 44 near the'intakeport of the pump.

The particular meter shown in Fig. 5 is of the oscillating piston typeand projects into the tank 28. The lid 2| may be an integral part of themeter housing 45 in which the oscillating piston operates. Liquid entersthe meter through an intake port 46 in the bottom of the housing 45.

A check valve 41, opening inwardly, normally closes this port. Thisvalve is loaded by a spring 48 so that itwill not yield untilapredetermined fluid pressure has been developed in the tank 28.

- The internal construction of the meter may be of standard type andforms no part of my inven-" tion. The meter is. provided with an outletport mg to open the valve 60.

'49 into which is screwed pipe IS. The latter passes through an opening50 in the side ot'the tank 20,- and said opening is sealed againstleakage by a stuffing box 5|.

w The delivery pipe 3 is provided at its outer end with a T-fitting 56(Fig. 2), one lateral arm of which is connected by a short length-oipipe 51 to an indicating gage 58. The opposite arm is clrisled by a plug59, as will be explained presen y.

The hose I1 is connected at one end thereof to the gage 58. The nozzlel8 at the other'end of the hose is provided with a delivery valve 68, asshown in Fig. 3. This valve opens inwardly and is normally'held inclosedposition'by a spring 8|. The stem 62 of the valve 88 passes out 01the nozzle through a stufllng box 68 in position to be operated by acontrol lever 64. A button 51 pivoted on the lever 84, is held inalinement with the stem 82 by a coil spring 86 which encircles the stemand is compressed between the stuflln box and a flange on the button 81.A certain amount of clearance is'provided-between the stem and thebutton so that the controllever may be moved through an appreciableangle betore start- I The purposeoi this lost'inotion' will appearpresently. The spring 88 aside from holding the button in alincment withthe stem serves to prevent chatter of the valve when it is slightlyopened.

The control lever 84 85 in the usual manner and the free end 68 of thelever projects through a slot in the guard 85. The nozzle is normallysupported on a hook 18 which has a lug adapted to project through theslot 89 in such position as to'engage the lever end is protected by aguard- 68 and prevent opening of the nozzle valve while the nozzle is onthe hook.

A rheostat 1| (Fig. 2) is provided in the motor circuit. This rheostatis controlled from the nozzle by means of a hydraulic actuating system.The latter comprises a bellows element 12 (Fig. 3). which is fittedwithin a suitable casing 13 in the nozzle. A flexible tube 14 leads fromthe inner end of the bellows and extends through the hose, terminatingat its opposite end in formed in the plug 59. Fixed to the plug andcommunicating with this chamber is a bellows 11. A filler port isprovided for the chamber 15, said port being normally closed by screwplug 18 and gasket 19. A suitable liquid is introduced through thefiller port completely to fill the two bellows and the connecting tube14. I

It will be observed that the tube 14 is longer than the hose, beingspiralled o r looped therein so that there is considerable slack in thetube under normal conditions, as shown in Fig. 1. The purpose of this isto provide for stretch of the hose in service and prevent undue strainon the tube.

The outer end of the bellows 11 is closed by a bearing plate 80 againstwhich bears one arm 8| of a lever 82. The other arm of the lever haspin-and-slot connection to the switch arm of the rheostat 1|. A spring83 presses the arm 8| against the plate 80.

The bellows12 at the nozzle is closed at its outer end and has a stem 84which projects through a diaphragm 85 fixed in the casing 13. The stem84 is provided at its outer end with a rounded cap 88. A spring 81fitted between the cap and the diaphragm holds the bellows 12 normallyin expanded condition and also presses the cap outwardly in position tobe engaged by a cam surface is partially closed the resistance in themotor cir-.

cuit will be increased in substantial proportion,

thereby insuring a substantially constant liquid pressure through themotor and hose.

A slightly modified form of the rheostat control at the nozzle iscontrol lever is provided with an adjustable cam 89 adapted to engagethe cap 86. The cam 88 is pivoted upon the end a screw 88 in the part 88may be adjusted to force the cam outwardly against the pressure of aspring 8|.

By this means the operation of the rheostat with respect to the openingof the nozzle valve may be regulated as desired.

The operation of the apparatus as so far described is as follows: whenthe operator desires to dispense liquid from the tank l5 he removes thenozzle I8 from the support 18 and then presses the control lever ,84,thereby first starting the motor by depressing the cap ther movement ofthe control lever, opening the nozzle valve 88. The motor drives thepump which then draws liquid from the supply line 4| and delivers itthrough the screen 29 into the separator tank 28. In passing through thescreen 29 the liquid is not only filtered but is also suba chamber shownin Fig. 4. Here the 68 of the control lever and The parts are'soproportioned that- 88 and then by iurdivided into small-streams, thusfacilitating the liberation of entrained gas. When the apparatus isfirst started with the tank 20 empty, the .entrained gas liberatediromthe liquid and the air- 5 in the tank displaced by .the'liqiiid willescape through the vent 35 and thence out of the stand pipe 38, but asth liquid accumulates in the tank 20.it will covertlie vent 35, trappingthe gas in the tank above the level of said vent. The pump II forcesliquid into the tankat such a rate that despite the constantly open vent35 a considerable pressure is developed in the tank 20 and as soon asthis pressure is suiiicient to overcome the spring 48, the liquid willdischarge through the meter into the delivery pipe-I6 and thence throughthe hose andout o1 thenozzle I8.

As the entrained air and vapor accumulates in the tank 20 it will forcethe liquid level downward. Under extreme conditions the level might belowered suinciently for the gas to blow out of the tank through thevent. This would cause a sudden lowering of pressure, but'th'e. springloaded valve 41 would then close immediately and prevent the surge fro'mafl'ecting the meter. How-* ever, the capacity of the tank20 is morethan sufficient to take care of all the gas that would collect undernormal conditions since between dispensing operations the liquid levelwould gradually settle until the vent 35 was uncovered and the gas couldescape. Asking as the vent 35 is submerged-there will be a discharge ofliquid through the vent but in so fine a stream as not materially toafiect pressure conditions in the tank while the pump is The liquidthusdischarged will accumulate in the stand pipe until it builds up asuiiicient head upon the valve 42 to overcome the pull of spring 43,open said valve and discharge into the supply line. However, suchdischarge 'will only take place while the pump is exerting suction inthe supply line, and the valve will close before the accumulated liquidis entirely discharged so that there will always be a certain quantityof liquid overlying the valve to seal the same against leakage of airfrom the stand pipe into the supply line. i

When the hose inon the hook the system remains filled with liquid exceptthat the level in the tank is gradually lowered "by discharge throughthe vent 35 until the liquid level drops to the-level of said vent.'Then any-accumulation oi gas in the tank escapes and the pressure inthe tank drops to atmospheric pressure. However,

the liquid in the hose, delivery line and meter Y cannot escape becauseof the check valve 41. To allow for expansion due to wide variations oftemperature, a pressure relief valve02 is provided in the discharge portof the meter. This valve is spring-loaded to open at a pressureconsiderably higher than that required ion dispensing of the liquid sothat when for any rason the liquid expands in the hose and delivery pipeline a portion of the liquid may'escape through the valve 92 into thetank 20 and relieve the pressure.

. Iii the modified form of apparatus. shown in Fig; 6, the: meter may beremote from the main separator tank if desired. An auxiliary tank isalso provided and interlocking valves connect the main tank to theauxiliary tank and the latter to a stand pipe. Y

The main supply reservoir I is connected by a supply line IM to theintake port or a pump I02. The .latter is driven by a motor I 03.- Fromthe discharge port of the pumpa pipe I04 leads into the main separatortank I05. Connecting 75 pipes IM and I04 is a'by-pass pipe I06 provided.irom a switch box I33. The switch with a spring-loaded valve I01 whichcontrols the pressure of the liquid delivered by the pump I02 to theseparator tank I05. Below the by-pass pipe I06, the supply line IN isprovidedwith a check valve I08 which opens toward the pump I02. Thesupply line extends into the tank I00 to a point near the bottom thereofand is provided with the usual toot valve (not shown).

- The pipe I04 passes through a stufiing box H0 at the bottom of theseparator tank I05 and 10 extends into the separator tank to a pointnear the upper end thereof, where it enters a tubular screen III fixedto and depending from a plug I The latter is screwed into an openinginto the top of the separator tank and is sealed against air leakage bygasket II3. Near the bottom of the tank I05 there is an outlet port iromwhich leads a pipe IIG to the meter II5. From the discharge end of themeter a delivery pipe 0 leads to the hose (not shown). leads from pipe IIG into the tank I05. Normally this branch pipe is closed byaspring-loahied check valve II8 opening toward the" tank. Another checkvalve H9 in the pipe ll I3 opens toward the meter. 23

Y The auxiliary tank I is smaller than the tank I05 and is situated' toone side and above the main tank. A passage I2 I connects the two tanks,such passage running from a point at or nean the top of tank I05 to thebottom of the tank I20. In this-passage there is a rotary plug valveI22.

t The tank I20 is closed at the top by a lid I23 which issecurely-bolted fast and a gasket I23 between the lid and the tankinsures an air seal.

The lid I23 is formed with a discharge nozzll25 into which is screwedthe lower end of a stand pipe I26. The latter leads to a convenient highpoint and preferably terminates in a goose neck,

as shown. In the discharge nozzle I20 there-is a rotary plug valve I21.7

In this particular embodiment of my invention,

the hose nozzle is not supported on a fixed hook but on a pivoted'hosehook I28 of the type generally known in the art as a telephone hook..The hook I23 is pivoted on a stud I29 and hasla 4 depending arm I30.This arm has pin-and-slot connection I3I with a switch lever I32projecting controls the circuit of the motor I03.

When the hose nozzle is supported on the hook z I20 the weight of thenozzle will hold the hoolr in the position shown by broken lines in-Fig.6 and-the switch lever I32 will then be in the of! position. A springI35 connects the arm I30 and lever I32-and assists in,holding the armI23 in depressed positionand the switch arm I32 in 01! position. Whenthe hose is removed from the hook, the arm I23 must be manually pushedup to the position shown in full lines in order to start the motor. Whenthis occurs the axis of the; spring J35 will be moved past the pivot oflever I32 and will tend to hold the lever I23 in raised position, asshowndn full lines. However, the weight of the hose nozzle when appliedto the hook will be suiiicientto trip the levers and move them "to theposition shown .by broken lines in Fig. 6. i 3 The valve I22 is providedwith an operating arm I36 which is connected by a link I31 to the hoshook 128. Similarly the valve I2! is provided with an operating arm I38which is con- I39 are each provided'with a pin-and-slot con- A branchpipe ll'l 20 v tank I00 and deliver it to the nection with the hosehook, and the slots are so relatively proportioned that there-is agreater delay in the case of the valve I21 than in that of valve I22.Thus, when hose hook I20 is lowered by hanging the nozzle thereon, themotor switch will open first, then the valve I22 will open and finallythe valve I21 will open.

The operation of the apparatus is as follows: Normally when the hosenozzle is hung upon the hook I28 the' latter will assume the positionshown in broken lines in Fig. 6, with both of the valves I22 and I21open and the motor circuit open. This position of the valves and switchwill be maintained until the hook is raised manually, to start the motorand close the valves. The pump then operates to draw liquid from theseparator tank I05, the by-pass I05 and spring-loaded valve I01 servingto prevent excess pressure of the liquid delivered to the tank I05. Theliquid pumped into the separator tank discharges through the tubularscreen I I I and any gas that may be entrained in the liquid separatestherefrom and accumulates in the top of the main tank I05..

Thisga's, if there be any, is merely compressed in the top of the tanksince it cannotescape by way of valve I22. The liquid in the tank isforced past the check valve III) through the meter II5 and thence by wayof the delivery pipe I i6 to the hose. In the meantime, the check valveI I8 will remain on its seat because the pressure in the tank I05 isgreater than or at least as great as that of the liquid flowing throughthe meter I I5. Furthermore, the spring-loading on the valve will assistin holding it in its seat.

The tank I05 is large enough to retain all the gases that may separateout from the liquid during the filling of a motor vehicle tank ofmaximum size. After the dispensing is completed the hose nozzle is hungon the hook I28 and the "weight of the nozzle swings the hook down tosure, however, is relieved as soon as the vaporenters the tank I20 andsuch relief takes place before the valve I21 is opened, hence, thedischarge from the tank i20 through the stand pipe I28 to atmospherewill be comparatively slow and under low pressure. As a result, anyliquid which might be blown from tank I05 to the tank I20 will separatefrom the vapor in the latter tank and will then pour down the passageI2I through the open valve I22 back into the tank I05. Thus, theauxiliary or expansion tank I20 takes care of any high pressure thatmight be developed in the tank I05 and acts as a further separator ofgas from the liquid, so that no liquid will be discharged from the standpipe I26.

Since the tanks I05 and I20 are open to atmos-,

provided. Thus, after the apparatus is once 0P9. as the hose w ll be 7full of liquid, it being understoodthat the hosenormally closed anderated the meter ,5 as well is provided with the usual operating, it isdesirable to,

=ing said rheostat.

- liquid under delivery line, a manually manually opened discharge valveat the nozzle. The check valve II8 serves to take care of pressure inthe hose and meter which might develop as a result of a rise inatmospheric temperature. This check valve, as explained above, isspring-'- loaded so that normally it will retain the liquid in the meterand hose, but it will yield and permit discharge of a certain portion ofthe liquid from the meter and hose into the tank I05 when the liquid isexpanded by thermal conditions.

It will be understood that the embodiments described above are to betaken as illustrative and not limitative of my invention and that Ireserve the right to make various changes in form, construction andarrangement of parts without departing from the spirit and scope of thefollowing claims.

I claim:

1. In an apparatus of the character described, a. meter, a deliveryline, a pump for delivering liquid under pressure through the meter intosaid I line, a. motor for driving the pump, a normally closed dischargevalve for the delivery line, a manually operable device for opening saidvalve, and means actuated by said device for controlling the speed ofsaid motor. v v

2. In an apparatus of the character described, a meter, a delivery line,a pump for delivering liquid under pressure through the meter into saidline, a motor for driving the pump, a manually operable discharge valvefor said delivery line, and means for varying the speed of the motorsubstantially in proportion to the opening of said valve.

3. In an apparatus of the character described, a meter, a delivery lineincluding a discharge nozzle, 9. pump for delivering liquid under.pressure through the meter into said line, a motor for driving thepump, an energizing circuit therefor, a rheostat controlling saidcircuit, and means controlled from the discharge nozzle for operatof thecharacter described, a pump for delivering 4. In an apparatus a meter, adelivery line, liquid under pressure through the meter into said line, amotor foridriving the pump, an energizing circuit therefor, a, rheostatcontrouing said circuit, a normally closed discharge valve for thedelivery line, a manually opening said valve, and means controlled bysaid device for operating said rheostat.

5. In an apparatus of the character described,

a meter, a delivery line, a pump for delivering the meter into saidliquid under pressure through line, a motor for driving the pump, anenergizing circuit therefor, a rheostat controlling said circuit, anormally closed discharge valve for the delivery line, a. manuallyoperable device for opening said valve, and means controlled by'saiddevice for operating said rheostat in timed relation to the opening ofsaid valve.

6. In an apparatus of the character described. a meter, at deliveryline, a pump for delivering pressure through the meter into said line, amotor for driving a pump. an energizing circuit therefor, a rheostatcontrolling said cirbuit, a normally closed discharge valve for theoperable device for opening said valve, means controlled by said devicefor operating said rheostat, the last mentioned means including anadjustable device for timing the operation of the to the opening of thevalve. p

7. In an apparatus of the character described, a separator, a meter, adelivery line including a operable device for rhedstat witli'respectnormally closed manually operable discharge valve for said line, meansfor delivering liquid under pressure through the separator into themeter and thence into said line, a check valve for preventing return ofliquid from the meter into the separator, and a pressure relief valveadapted to permit return of the liquid into said separator when thepressure in said line exceeds that in the separator by a predeterminedamount.

8. In an apparatus of the character described, a separator tank, adelivery line leading out of the tank and having a manually operablenormal- .ly closed discharge valve, means for introducing liquid underpressure into said tank, and valve means responsive to relativepressures in said tank and said delivery line for controlling transferof liquid in either direction therebetween, said valve means preventingliquid flow from the tank into. the ceeds that in the line by apredetermined amount and preventing return flow from the line into thetank unless the pressure in the line exceeds that "in the tank by apredetermined amount.

9. In an apparatus of the character described, a separator, a deliveryline leading out of the separator and having a manually operablenormally closed discharge valve, means for introducing liquid underpressure into said separator, valve means responsive to relativepressure in said separator and said, line for controlling transfer ofliquid in either direction therebetween,

* said valve means preventing liquid flow from the separator into theline unless the pressure'in the termined amount and preventing returnflow from the line into the separator unless the pressure in the lineexceeds that in the separator by a predetermined amount, and means formeasuring the liquid flowing from the separator into the delivery line.1

10. In an apparatus a separator, a meter, a delivery line including anormally closed manually operable discharge valve therefor, means fordelivering liquid under pressure through the separator into the meterand/thence into said line, a bheck valve for prev venting return ofliquid from the nieter into the separator, .;a by-pass from the deliveryline into the separator, and a pressure-relief valve in said by-passadapted to into the separator when the pressure in said line exceedsthat in the separator by a predetermined 'amount. 4

g 11. In an apparatus of the character described, a separator, a meter,a delivery normally sclosed manually operable discharge valveifor saidline, m'eansfor delivering liquid under pressure through the separatorinto the meter and thence into said line, and means permitting return ofliquid from the line directly into the separator, only when the-pressurein the line exceeds that in the separator by a predetermined amount. J

' 12. VA combined meter; and gas separator ,fora liquid dispensingsystem, comprising, a ineter, a sealed tanksurrounding themeterandproviding a gas separator chamber therebetweenfan inletport-forintroducing liquid under pressure into the chamber, and anintake port forthe' meter near the bottom of thetank, the tank having arestricted vent abovethe level of said intake port.

'13. A combined meter and gas separator for a liquid dispensing system,comprising, a meter, a

tank surrounding the meter and sealed thereto and providinga gasseparating chainber thereline unless the pressure in the tank ex ,theline by a Dredeof the character described,

permit return of the liquid 5 between, an inlet port for introducingliquid under pressure into the chamber, and an intake port for the meternear the bottom of the tank, the, tank having a restricted butconstantly open vent above the level of said intake port. t

i 14. In a liquid separator tank, an auxiliary tank, a restrictedpassageway connecting the tanks, a pump adapt ed to deliver liquid underpressure into the main tank, the latter having. an outlet delivery portbelow the level of the mouth of said passage-' t way, saidauxiliarytan'k having an outlet for the discharge of gins and a liquid dischargeport con nected to the suction side of the pump, and a valve normallyclosing the liquid discharge port but adapted to open in response to apredetermined difference of fluid pressure on opposite sides of thevalve.

15. In a liquid dispensing apparatus, a main separatortank, an auxiliarytank, a restricted passageway connecting the tanks, a pump adapt ed todeliver liquid under pressure into the main tank, the latter having anoutlet delivery port below the level of the mouth of said passagewayssaid auxiliary tank having an outlet forthe dis: charge of gas and aliquid discharge'port connected to the suction side of the pump, a valvein the discharge port opening toward the pump, and a spring adapted tokeep the valve normally closed but yieldable to a predetermined pressureon the valve to permit a discharge of liquidfrom the auxiliary tank. 7

16. In a liquid dispensing apparatus comprising a delivery line and apump for delivering liquid under pressure into said line, a mainseparator 2 tank interposed between the pump and the line, an auxiliarytank at a higher level than the main tank, a passageway leading upwardfrom the main tank to the auxiliary tank, a valve controlling saidpassageway; the auxiliary tank having a gas vent, a valve controllingsaid vent, a controller for opening and closing said valves, including atiming means whereby opening .of the passageway valvewill precedeopening of the ventvalve.

l7. In a liquid dispensing apparatus comprising a delivery line and apump for delivering liquid under p ssure into-said line, a mainseparator tank interposed between the pump and said line, main tank, apassageway leading upward mm the main tank to the auxiliary tank, avalve controlling said passageway, the auxiliary tank having a gas vent,a valve controlling 'said vent, a

controller for startingand stopp g the pump, line including a in andvalve operating means interconnecting said valves and said controllerfor closing the valves in timed relation'to the starting of the pump andA opening the valves-in timed relation to stoppingthe pump. q

is. In a liquid dispensing apparatus comprlsing al'delivery line and apump for delivering 1 liquid under pressure into said line, a mainseparator tank interposed between the pump and the line, an auxiliarytank at main tank, a passageway. leading-upward from a higher level thanthe the main tank to the auxiliary tank, a valve controlling saidpassageway theauxiliary tank having a gas vent, a valve controlling saidvent, a

controller for starting and stopping the pump,

l and valve operating means interconnecting said valves and saidcontroller for closing the valves in timed relation to the starting ofthe pump and opening the valves in timed relation to stopping thev pump,said means including a lost mol an auxiliary tank at a higher level thanthe I tion eonnection whereby the pump will be stopped before saidvalves are opened.

19. In a liquid dispensing apparatus comprising a delivery line and apump for deliveringliquid under pressure into said line, a mainseparator tank interposed between the pump and the line, an auxiliarytank at a higher level than the main tank, a passageway leading upwardfrom the main tank to the auxiliary tank, a valve controlling saidpassageway, the auxiliary tank having a gas vent, a valve controllingsaid vent, a controller for starting and stopping the pump. and valveoperating means interconnecting said valves and said controller forclosing the valves in timed relation to the starting of the pump andopening the valves in timed relation to stopping the pump, said meansincluding a lost motion connection whereby the passageway valve will beopened after the pump has stopped and the gas valve will be opened afterthe passageway valve has opened.

20. In a liquid dispensing apparatus, a main separator tank, a deliveryline including a discharge nozzle, a pump for delivering liquid underpressure into the separator tank and thence into the delivery line, amovable support for the discharge nozzle and adapted to be depressed bythe weight, of said nozzle, an auxiliary tank at a higher level than themain separator tank, a passageway leading upwardfrom the main tank tothe auxiliary tank, a valve controlling said passageway, the auxiliarytank having a gas vent, a valve controlling said vent, and meansinterconnecting said valves with said movable support whereby when thesupport is depressed the valves will be opened.

21. In a liquid dispensing apparatus, a main separator tank, a deliveryline including a discharge nozzle, a'pump for delivering liquid underpressure into the separator tank and thence into the delivery line,charge nozzle and adapted to be depressed by the weight of said nozzle,higher level than the passageway leading upward from the main tank tothe auxiliary tank, a valve controlling said passageway, the auxiliarytank having a gas vent, a. valve controlling said vent, and meansinterconnecting said valves with said movable support whereby when thsupport is depressed the valves will be opened, said means including aloose connection whereby opening of the passageway valve will precedeopening of the vent valve.

22. In a liquid dispensing apparatus, a main separator tank, a deliveryline including a discharge nozzle, a pump for delivering liquid underpressure into the separator tank and thence into the delivery line, amovable support for the discharge nozzle and adapted to be depressed bythe weight of said nozzle, an auxiliary tank at a higher level than themain separator tank, a passageway leading upward from the main tank tothe auxiliary tank, a valve controlling said passageway, vent, a valvecontrolling saidvent, means interconnecting said valves with saidmovable support whereby when the support is depressed the valves will beopened, a motor for driving the pump, an energizing circuit for theeluding a switch, and means connecting said switch and support openedwhen the support isdepressed.

23.111 a liquid dispensing apparatus,'a.

separator tank, a delivery line including a dischargenomle, a pump fordelivering liquid under a movable support for the disan auxiliary tankat a main separator tank, a

the auxiliary tank having a gas motor inwhereby the switch be liquid dip nsing system.

surrounding the meter and providing o gaa sepapressure into theseparator tank and thence into the delivery line, a movable support forthe discharge nozzle adaptedf tobe depressed by the weight of saidnozzle, ariau'xiliary tank at'a higher level than the main separatortank, a passageway leading upward from the main tank to the a iary tank,a valve controlling said passageway, the auxiliary tank having a gasvent, a valve controlling said vent, means interconnecting said valveswith said movable support whereby when the support is depressed thevalves will be opened, a motor for driving the pump, an'energizingcircuit for the motor including a switch, means connecting said switchand support whereby the switch will be opened when the support isdepressed, and means tending to hold the support in either depressed orraised position.

24. In a liquid dispensing apparatus, a main separator tank, a deliveryline including a discharge nozzle, 2. pump for delivering liquid underpressure into the separator tank and thence into the delivery line, amovable support ior the discharge nozzle adapted to be depressed by theweight of said nozzle, an auxiliary tank at a higher level than the mainseparator tank, a passageway leading upward from the main tank to theauxiliary tank, a valve controlling said passageway, the auxiliary tankhaving a gas vent, a valve controlling said vent, means connecting saidvalves with said movable support whereby when the support is depressedthe valves will be opened, a motor for driving the pump, an energizingcircuit for the motor including a switch, and means connecting saidswitch and support whereby the switch will be opened when the support isdepressed, the switch and valve connections to the sup rt being sointerrelated that the switch will open before the valves are opened.

25. In a liquid dispensing apparatus, a main separator tank, a deliveryline including a discharge nozzle, a. pump for delivering liquid underpressure into the separator tank and thence into the delivery line, amovable support for the disconnecting said switch and support wherebythe i switch will be opened when the support is depressed, the switchand valve connections to the support being so interrelated that theswitch will open before the passageway valve is opened and the latterwill open before the vent valve is opened.

26. In a liquid dispensing" apparatus, a separator tank, a delivery.line including a discharge nozzle, a pump for delivering liquid underpressure into the pressure tank and thence into the delivery line, amovable support for the nozzle when not muse, said support beingadapted'to be depressed by the weight of said no tank having a gas vent,a valve ,controllln vent,-and means operatively connecting said valveand said support whereby the valve will-be opened when the support isdepressed.

- Z'L'A combined meter and gas separator for a a meter,-a sealed tankrating chamber therebetween, an inlet port for introducing liquid underpressure into the chamber, an intake port for the meter near the bottomof the tank, and means for discharging gas from the tank.

28. In a liquid dispensing apparatus, a. main separator tank, a deliveryline including a. dis charge nozzle, a pump for delivering liquid underpressure into the separator tank and thence into the delivery line, amovable support for the discharge nozzle and adapted to be depressed bythe weight of said nozzle, an auxiliary tank at a higher level than themain separator tank, means for discharging gas from the main tank intothe auxiliary tank, the latter having a gas vent, a valve controllingsaid vent, and means connecting said valve and said support whereby whenthe support is depressed the valve will be opened.

29. In combination a pump operable at will to deliver liquid underpressure, a delivery line for the liquid, a meter for measuring theliquid delivered to said line, a separator between the pump and themeter for separating from the liquid any entrained therein, meansproclosed vent for said gas, and means for opening said vent after eachoperation of the pump.

30. In combination a pump for delivering liquid under pressure, acontroller for starting and stopping the pump, a delivery line for theliquid, a meter for measuring the liquid delivered to said line, aseparator between the pump and the meter for separating from the liquidany gas that ma be entrained therein, said controller fo rator.

31. In a liquid dispensing apparatus, a delivery line including adischarge nozzle, a pump constructed and arranged to deliver liquidunder pressure into the delivery line, said delivery line and meanscontrolled by venting the gas from the sepaexceeds that in the chamberby a predetermined amount.

32. In a liquid dispensing apparatus, a delivery line including adischarge nozzle having a manuswitch having a switch arm,

the operation of the when the pressure in said line on the nozzle sideof ,the meter exceeds that on the pump side of the meter.

33. In a liquid dispensing apparatus, a delivery line including adischarge nozzle having a manually operable valve, a pump constructedand said line, said line including a meter for measurmg liquid flowtherethrough to the nozzle, a bypass around the meter and valve meanspreventing flow through the by-pass to the nozzle and preventing returnflow from the nozzle through the meter.

34. In a liquid dispensing apparatus, a delivery line including adischarge nozzle having a manually operable valve, a pump constructedand arranged to deliver liquid under pressure into said line, said lineincluding a meter for measuring liquid flow therethrough to the nozzleand a by-pass around the meter, a check valve in the meter openingtoward the nozzle, and a check valve in the by-pass opening toward thepump.

35. In a liquid dispensing apparatus, a delivery line including aflexible hose terminated controller operable to start and stop saiddelivery means, a manually operable valve on the nozzle for controllingthe discharge of said liquid therefrom, said delivery line including ameter for measuring the flow of liquid through the line and includingalso a reservoir having a vent, a valve controlling said vent, andoperating means interconnecting said delivery controller and said ventcontrolling valve whereby the vent will be closed when the deliverymeans is started and will be opened when the delivery means is stopped.

36. In a liquid dispensing apparatus, a delivery line including aflexible hose terminated at its free end in a discharge nozzle, a pumpfor delivering liquid under pressure to said line, an electric motor fordriving the pump, means for'supplying the motor with power including acontrol a manually operable valve on the nozzle for controlling thedischarge of said liquid therefrom, said delivery line including a meterfor measuring the flow of liquid through the line and including also areservoir having a vent, a valve controlling 'said vent, an operatinglever for the valve and means operatively interconnecting said switcharm and said lever for conjointly opening and closing the vent andswitch, said interconnecting means including a lost motion connection todelay valve lever with respect to GEORGE W. STEDWELL.

said switch arm.

